Implementation of Cascaded Switched Diode Multilevel Inverter for Photovoltaic Integration

Abstract

In recent times, significant research has been carried out on Multi-Level Inverters (MLI), due to their importance in various applications such as renewable energy system and drives. Generally, multilevel inverters use more number of switches, which require more installation space and cost .The major focus of current research is to obtain a high quality output with less number of switches.Dual stage cascadedswitcheddiodemultilevel inverter methodology ispresented in this paper.A positive staircase output is obtained in the first stage. Full wave output voltages are generated by applying phase opposition disposition technique adding full bridge inverter in the second stage. The proposed method has benefits of minimized number of components and less total harmonic distortion. The proposed methodology is carried out using MATLAB/SIMULINK and its performance is analysed.

Keywords: Multi level inverter (MLI), Cascaded switched diode (CSD) multi level inverter, Phase opposition and disposition (POD).